Bellari PA550 Preamplifier with RIAA Phono Preamp & Headphone Amp
Note that plugging into the headphone jack will mute the RCA output circuit, leaving you with a dedicated headphone amplifier. A ground post is on the rear of the device for your turntable's ground connection; this feature can help you minimize the noise commonly associated with ground loops.
The PA550 features an equalizer based on the industry standard RIAA curve. With the bass and treble knobs, you can tailor the lows and highs of the signal to better suit your preferences. A large volume knob is also on hand for adjusting the level of the output. A power supply is included.